Fuels that cannot be easily made or "renewed," such as oil, natural gas, and coal.
Nonveneer panel
Any wood-based panel that does not contain veneer and carries an apa span rating, such as wafer board or oriented strand board.
Normal recovery capacity
A characteristic applied to domestic water heaters that is the amount of gallons raised 100 degrees Fahrenheit per hour (or minute) under a specified thermal efficiency.
Normal size
Size of lumber before dressing, rather than its actual or finished size.
Normal slope application
Method of installing asphalt shingles on roof slopes between 4 inches and 21 inches per foot.
Normal wear and tear
Physical depreciation arising from age and ordinary use of the property.
Normalizing
Heating metal to a specified temperature and then cooling to change the properties of the material.
Norman brick
Solid core brick measuring 4 x 2 2/3 x 12 inches.
Norwegian brick
Solid core brick measuring 4 x 3 1/2 x 12 inches. Also come sin a 6 x 3 1/2 x 12 inch size.
Nosing
(1) A hardwood molding used to cover the outside comer of a step, milled to meet the hardwood floor in the horizontal plane, to meet the riser in the vertical plane. (Usually used on landings.). (2) Metal flashing bent at a 90¼ angle and is installed around roof perimeters, curbs, platforms, etc. in order to protect the edge of the roofing system. Nosing should not be used in place of drip edge.
